MARANTZ SR7400 OverHEATING!!

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tag469
tag469 Posts: 3
edited March 2007 in Troubleshooting
Having a tough time enjoying the Lsi25s b/c Marantz sr7400 constantly shuts down into "protect" mode whenever I try cranking the volume. The unit is properly located, ventilated and connected yet it gets so hot one could fry egggs on this reciever. Any solutions?
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  • danger boy
    danger boy Posts: 15,722
    edited March 2007
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    this is a common problem when using a receiver and 4ohm speakers... you need to add a two channel amp to take away some of the load from your Marantz 7400 receiver. do that and the overheating and shutting down problem will likely disappear. :)
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  • Serendipity
    Serendipity Posts: 6,975
    edited March 2007
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    Same problem here with an Onkyo TX-SR702 receiver. My receiver's manual states that the speaker impedance must not be lower than 8 ohms.

    With my Definitive BP10B's, which dip to around 4 ohms, I have to place two PC cooling fans on top of the receiver to prevent it from overheating.
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  • howie777
    howie777 Posts: 357
    edited March 2007
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    Have you verified you have enough ventaliation on the Marantz 7400? Check the owers manual and it will list how much space it needs to be properly cooled. I ask because I have the Marantz 8200 running 5 M&K 851's (rated to 4 ohm) and have been doing so for years with no issues (My receiver is NOT in an eclosed space. Now my 851's aren't nearly the same size as your speakers but I would think it could handle them ok ( I think the 7400's amp section is actually better than my 8200's).

    If you have plenty of space for the Marantz, I'd probably recommend a seperate amp. Maybe you have a friend you could borrow a 2 channel amp from and see if that solves the issue?

    Hope that helps some

    Howie
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  • schwarcw
    schwarcw Posts: 7,328
    edited March 2007
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    The Marantz receivers are not recommended for 4 ohm. If you're trying to drive a pair of LSi25's hard with the Marantz, look out! Your amp will definitely get hot!
    Carl

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